Evaluation of the genes actions on growth habits of pumpkin in crossing of zucchini and hull-less seeded pumpkin using generation mean analysis
2022
Davoodi, Sima | Olfati, Jamal-Ali | Rabiei, Babak | Sabouri, Atefeh | Kiani, Ghaffar
Selecting an appropriate breeding method depends on the type and relative proportion of genetic components. In this study, six generations P1, P2, F1, F2, BC1 and BC2 from a cross between two cucurbita varieties crossing of hull-less seed pumpkin and squash, S10×P25, were constructed and evaluated for main stem length. Yield and its components (number of fruit per hectare, number of seeds per fruit, fruit weight and 100- seed weight) were also evaluated. The experiment was carried out in a randomized complete blocks design with three replications in 2019. The results showed significant differences among generations for main stem length. Scaling and Chi-square (χ2) tests suggests the presence of digenic epistasis for this trait. According to the results, additive variance was more important for most of the traits, meaning that selection is a good way to improve these traits. High heterosis was observed in the F1 hybrid for all of the traits. High narrow-sense heritability estimates were shown for all of the traits. Therefore, according to the results of estimating the genetic effects of traits, especially traits related to growth habit and reaching a shorter stem length, the selection method can be used.
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